Elevator.



Patenfed Feb. 5, 19m.

A. RDBINSUN.

ELEVATOR.

(No Model.)

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No. 667,404. Patented'Feb. 5, MN. A. ROBINSON.

ELEVATOR.

(Applicationflled Oct. 9, 1900.;

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ANDREWV ROBINSON, OF UHRIOHSVILLE, OHIO.

ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 667,404, dated February5, 1901.

Application filed October 9, 1900. serial No. 32,581. (No model.)

To all whom, it may concern:

Be it known that I, ANDREW ROBINSON, a citizen of the United States,residing at Uhrichsville, in the county of Tuscarawas and State of Ohio,have invented certain new and useful Improvements in Elevators; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to elevators, and most especially to the meansfor preventing an untimely descent of the car or platform when weighted.

The object of the invention is the provision of safety appliances forelevators which will be effective in operation and easy of manipulation,the locking being automatic and the release of the car being undercontrol of the attend ant,thereby minimizing the chances for accident.

For a full description of the invention and the m erit-s thereof,andalso to acquire a knowledge of the details of construction of the meansfor efiecting the result, reference is to be had to the followingdescription and drawings hereto attached. t

While the essential and characteristic features of the invention arenecessarilysusceptible of modification, still the preferred embodimentof the invention is illustrated in the accompanying drawings, in whichFigure 1 is a perspective View of an elevator, showing the applicationof the invention. Fig. 2 is a detail perspective View of the lockbar.Fig. 3 is a transverse section showing the disposition of the parts whenthe car is free from the locking mechanism. Fig. 4 is a view similar toFig. 3,showing the car locked.

Fig. 5 is a horizontal section on theline X X of Fig. 4. Fig. 6 is adetail section of the cross-bar at the upper end of the car or platform,showing more clearly the trip and the lower bent end thereof forming areinforcement.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The well or shaft of the elevator may be of any desired construction,depending upon the location and surroundings of the structure to beequipped with the elevator, and, as shown, it comprises a series ofvertical bars or posts 1, joined by longitudinal and transverse tiebars.The car or platform 2 is guided in its vertical movements by ways 3,located at 0pposite sides of the elevator-shaft in a manner wellunderstood. The car or platform may be of any pattern and, as shown, isof the type commonly employed in freight-elevators and is provided atopposite sides with posts or uprights 4, which are joined at their upperends by a cross-beam 5, to which the hoisting cable or rope 6 isattached. The car or platform may be operated by any suitable hoistingmechanism and in practice is one of a pair attached to opposite ends ofthe hoistingcable which passes over a sheave-pulley directly above thewell or shaft, so that as one car ascends the other correspondinglydescends, the empty car being lifted by the load of the descending car.

The lock-bar 7 is attached at its ends to hangers 8, which are pivotedat their upper ends to the sides of the shaft or well in line with theways or vertical guides 3. Suspending-hooks 9 are rigidly attached tothe end portions of the lock-bar 7 and engage with the cross-piece 5 orlike part of the car or platform, holding the latter in suspension whenelevated to the predetermined point. The upper ends of the hooks 9 arebent to engage over the top edge of the part 7 and their lower orhorizontal portions curve slightly, so as to prevent casualdisengagement thereof from the cross-piece 5 when the car is supportedthereby. When the car is elevated and held suspended, the lock-bar 7lies beside the cross-piece 5, as shown most clearly in Fig. 4, and thelower portion of the hooks 9 engages under the cross-piece 5. In orderto preventwear upon the lower edge of the cross-piece 5, it isreinforced by the bent end 10 of a trip 11, located in the plane of thehooks 9. The trips 11, one for each hook 9, are secured to thecross-piece 5 and their upper ends incline and their lower bent ends 10fit under said cross-piece to sustain the wear incident to the hooks 9engaging therewith. The purpose of the trips 11 is to engage with theterminals of the hooks 9 and move them aside to permit the cross-piece 5to pass thereby, and when said cross-piece has cleared the hooks thelock-bar 7 will assume a normal position and cause the hooks 9 toengageunder the cross-piece 5 and support the car or platform, as shown mostclearly in Fig. *4.

The releasing mechanism for the lock-bar consists of a lever 12,fulcrumed at its upper end to a side of the elevator-shaft and connectedwith the lower end of the adjacent hanger 8 by means of a link 13.

The lever 12 normally inclines downwardly from its piv-.

otal end and acts in the capacityof a weight to supplement'the'weight ofthe lock-bar and lock-bar 7 is suspended by means of the hangers 8, withthe hooks 9 projecting across the path of the cross-piece 5, and whenthe elevator is hoisted the trips 11 engage with the hooks 9 and swingthe lock-bar to one side, so as to admit of the said cross-piece passingthereby, after which the lock-bar returns to a normal position andcauses the hooks 9 to engage under the cross-piece and hold the car orplatform in suspension. After the car has been loaded it is released bythe attendant grasping the outer end of the lever 12 and moving the sameupward, which swings the lock-bar to one side and-withdraws the hooks 9from under the cross-piece 5, when the car or platform can descend.

Having thus described the invention, what is claimed as new is 1. In anelevator, and in combination with the car or platform having across-piece, a

transversely-disposed lock-bar pivoted so as i to swing laterally,suspending devices attached to the lock-bar and adapted to engage underthe cross-piece of the aforesaid car or platform, and trips attached attheir lower ends to the said cross-piece and having their upper endsinclined and adapted to ride upon the said suspending devices to permitthe cross-piece to pass thereby, substantially as specified.

2. In combination with an elevator car or platform having a crosspiece,a lock-bar, hangers pivoted at their upper ends in vertical line withsaid cross-piece and having their lower ends attached to the lock-bar,suspending devices applied to the lock-bar and projectinglaterally-therefrom across the path of the aforesaid cross-piece toengage thereunder, upwardly-inclined trips attached to the cross-pieceand adapted to ride upon the suspending devices to permit the passage ofthe cross-piece thereby, and an operating-handle having link connectionwith the said lockbar and forming a counterbalance therefor and limitedin its downward movement, substantially as specified.

3. In combination, a car orplatform provided with a cross-piece, atransversely-arranged lock-bar, hangers pivoted at their upper ends andhaving the said lock-bar attached to their lower ends, suspending-hooksattached to the lock-bar, trips applied to the cross-piece of the car orplatform and having their upper ends inclined and their lower ends bentto engage under the cross-piece and formed with reinforcements tosustain the wear of thesuspending-hooks, an operatinglever normallyinclined downwardly at its pivotal end, and a link connecting saidoperating-lever with'the adjacent hanger, substan tially as specified.

In testimony whereof I alfix my signature in presence of'two witnesses.

ANDREW ROBINSON.

